Question

i’ve found this line of code got error if the input not an number

int sum = Integer.parseInt(request.getParameter("sum"));

the error message is

type Exception report

message

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.NumberFormatException: For input string: "a"
root cause

java.lang.NumberFormatException: For input string: "a"

how to handle the input if the input is a string or null?

thanks

Answer 1

It really depends on what should be done if sum is not a number.

try{
 int sum = Integer.parseInt(request.getParameter("sum"));
 }
 catch(Exception e)
 {
  //how do you want to handle it? like ask the user to re-enter the values
 }